UiPath Remote Runtime causes memory leak

Description

The Service Host (svchost) consumes a lot of memory for the Remote Desktop Services (TermServ) process when running UiPath Remote Runtime without a Citrix extension installed on the client machine.

Cause

While running on the server machine, the UiPath Remote runtime component attempts to establish a connection with the client by opening a virtual channel and trying to send an initialization message (HELLO_MSG). These steps are performed in a loop with a timeout of 0.5 seconds, until the connection is established.

If the client machine doesn't have the UiPath Extension (for Citrix, VMWare, or Microsoft Remote Desktop and Apps) installed, the server can't connect, therefore the loop runs forever. Each time the opening of the virtual channel fails, a system event is generated, which leads to the memory leak inside svchost.

Solution

Edit Task Scheduler so that the UiPathRemoteRuntime.exe process starts only for those users that have the UiPath extension installed on their machines.

Note: This issue has been fixed in UiPathRemoteRuntime.msi versions 23.4.8 and newer. Download the UiPathRemoteRuntime.msi from Product Downloads in the UiPath Customer Portal.